前段時間中開發(fā)中遇到把美元轉(zhuǎn)成千分位顯示的需求，封裝了個方法解決這個問題

用到的宏

//字符串是否為空
#define IsStrEmpty(_ref)(( [(_ref) isKindOfClass:[NSNull class]]||(_ref) == nil) || ([(_ref) isEqual:[NSNull null]]) ||([(_ref)isEqualToString:@""]) || ([(_ref) isEqualToString:@""]) )

轉(zhuǎn)換方法

//轉(zhuǎn)化為千分位格式,例如 :33369080 輸出：33,369,080
+(NSString*)changeNumberFormatter:(NSString*)str{
   NSString *numString = [NSStringstringWithFormat:@"%@",str];
   NSNumberFormatter *formatter = [[NSNumberFormatteralloc]init];
   NSNumber *number = [formatternumberFromString:numString];
   formatter.numberStyle=kCFNumberFormatterDecimalStyle;
   NSString *string = [formatterstringFromNumber:number];
   NSLog(@"numberFormatter == %@",string);
   if(IsStrEmpty(string)) {
   return str;
   }
   return string;
}